Finding the Third Proportional to 2,589,851 and 5,639,485

Step by Step Solution

1. Step 1: Write the proportion equation
   2,589,851 : 5,639,485 = 5,639,485 : x
2. Step 2: Convert to fraction form
   2,589,851/5,639,485 = 5,639,485/x
3. Step 3: Cross multiply
   2,589,851x = 5,639,485 × 5,639,485
4. Step 4: Simplify right side
   2,589,851x = 31,803,791,065,225
5. Step 5: Solve for x
   x = 31,803,791,065,225/2,589,851
6. Step 6: Final answer
   x = 12,280,162.47